Tanzanias Onice Rosso Onyx is generally not recommended for exterior applications in very humid climates. Onyx is a type of marble that is known for its delicate nature and susceptibility to weathering and moisture damage. In high humidity climates, where there is excessive moisture in the air, onyx can be particularly problematic.
Humidity can cause onyx to absorb water, which can lead to the formation of stains, cracks, and damage to the stone over time. Additionally, onyx is relatively soft and porous compared to other natural stones, making it more prone to erosion and deterioration. The combination of humidity and outdoor elements like rain, sun exposure, and temperature fluctuations can further accelerate these issues.
If you are considering using onyx for exterior areas in very humid climates, it would be advisable to consult with a stone professional or a local supplier who can provide specific advice based on your location and project requirements. They may recommend alternative stone options that are more suitable for outdoor applications in humid environments, such as granite or certain types of engineered stones.